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Psoriasis patients do not have low Iron levels neither do Fish Oils neither Omega 3 Fatty acids have any definite role in treating psoriasis.
I would suggest that you visit a dermatologist
who would start you on specific therapy for psoriasis
I usually ask my patients of scalp psoriasis
to use a coal tar+salicylic acid
based shampoo, daily Or every alternate days.
Psoriasis is a steroid responsive dermatosis; topical treatment is mainly based on steroid+salicylic acid lotions, twice daily. Topical steroids
bring about a remarkable improvement in the condition as soon as 2 -3 weeks.
Topical Viamin D analogues e.g calcipotriol
, calcopotriene are alternative topical remedies for psoriasis. They are available in a lotion form combined with or without topical steroids.
Once significant improvement has been achieved with topical treatment, the improvement can be maintained with shampoos.